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Light intensity: Dimitriu and Dr. Michael Terman, president of The Center for Environmental Therapeutics, a nonprofit research and education institution that’s considered an authority on light ...
Dr. Terman, who has studied light therapy since the 1980s, says that your light box should offer 10,000 lux, be wide (for a full field of illumination), and hit your face at an angle and from ...
SAD lamps, or light boxes—which, to be effective, should emit 10,000 lux, the amount of light you’d see on the horizon at sunrise—are widely available in a range of sizes and prices ...
Artificial sunlight is useful in treating and preventing seasonal affective disorder (also known as winter depression, which causes depression symptoms specifically in winter), [3] and delayed sleep phase syndrome, in which the circadian rhythm (the rhythmic alternation between daylight and nighttime behavior and bodily states) is disturbed and the person falls asleep much later than he or she ...
Light therapy uses a lightbox, which emits far more lumens than a customary incandescent lamp. Bright white "full spectrum" light at 10,000 lux, blue light at a wavelength of 480 nm at 2,500 lux or green (actually cyan or blue-green [35]) light at a wavelength of 500 nm at 350 lux are used, with the first-mentioned historically preferred. [36] [37]
The history of light therapy can be traced back to ancient Egypt and India, where therapy with natural sunlight was first used to treat leucoderma. [3] In the 1850s, Florence Nightingale's advocacy of exposure to clean air and sunlight for health restoration also contributed to the initial development of light therapy for treatments. [4]
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